Wireless telegraphy.



m.- 7|4,64a.; Patented Nov. 25, I902.

-H. SHDEMAKER W IBELESS TELEGRAPH Y.

, {Appiication filed May 1a, 1901.

.j (.140 Model.)

Tm: "cams Pzrzns co.. PHDTO-LIYHD., WASHINGTON, a. c.

UNITED STATES PATENT @EETQE.

HARRY SHOEMAKER, OF PHILADELPHIA,PENNSYLVANIA, ASSIGNOR OF.

ONE-HALF TO GUSTAV-E 1 GEHRING, OF PHILADELPHIA, PENNSYL- VANIA.

,WIRELESIQS T LEGRAPH SPECIFICATION forming part of Letters Patent No. 714,648, dated November 25, 1902.

Application filed May 13, 1901. Serial No. 60,010I (No model.)

To all whom it may concern:

Be it known that I, HARRY SHOEMAKER, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and my invention is the. provision of an apparatus especially adapted to outdoor and longdistance work, as I employ a decohering mechanism which will absolutely prevent the filings in the coherer from feathering, and thus always render the coherer operative.

Another object of my invention is the provision of a receiving apparatus in which I employ a series of coherers provided with means for successively tapping the tubes to decohere the filings, said decohering mechanism being operated by a phonic wheel.-

Another objectof my invention is the provision of a simple and inexpensive construction of apparatus which will in use he thoroughly efficient and practical.

To attain the desired objects, my invention consists of a wireless-telegraph system embodying novel features of construction and combination of parts substantially as disclosed herein.

In the drawings, Figure 1 is a diagrammatical View of the entire system, and Fig. 2 is a top plan view of the phonic wheel and its near-by connections.

Referring by numeral to the drawings, the transmitting-station consists of the air and ground plates 1 and 2, a spark-producer or induction-coil 3, connected with said plates, and the batteries 4 and transmitting-key 5 being in circuit with the coil.

My receiving-station consists of the air and ground plates 6 and 7, connected to the wires 8, which are connected to the silver plugs 9 of the cohereror wave-responsive device 10, which is the first in the series. Connected to the wires 8 are the wires 11, to which at stated intervals are connected the wires 12 and 13 of the other coherers or wave-responsive devices 14. and 15, a battery 16 and a relay 17 also being in circuit with the three coherers. These coherers are constructed similar and have the usual filings or magnetic particles supported therein between the plugs. Adapted to be operated by this relay 17 is an armature 18, which makes a circuit through wires 19 with the batteries 20 and the sounder 21. Surrounding each of the tubes are the loosely-mounted rings or hands 22, which are adapted to'be attracted by their electromagnets 23, there being one electromagnet for each band, and in order that these electromagnets may be energizedone at a time in succession I employ a novel system, which I will describe in detail. This apparatus consists of'the circuit-making wheel 24, which is mounted upon and revolves with a shaft 25, journaled between bearings 26. This circuitmaking wheel is revolved continuously, and thus rotates an arm 27, carrying a contactpoint 28. Arranged equidistant apart and in line and so as to contact the contact 28 are the three brushes 29, 30, and 31. Connected with the brush 29 is a wire 32, which is connected with the electromagnet of the coherer 10, a wire 33 being connected with the magnet and the batteries 34, a wire 35 being connected with the batteries and the shaft 25. The brush 30 has a wire 36 connected to it and the electromaguet of the coherer 14, its circuit being completed through the wire 37, batteries 34:, and wire 35. The brush 31 has a wire 38 connecting it with the electromagnet of thecoherer 15, a wire 39 completing its circuit through wire 37, batteries 34, and wire 35.

The phonic wheel employed by me is well known in the art of multiplex telegraphy and has been fully described in Patent No. 203,423, granted to La Cour May 7, 1878.

From this description, taken in connection with the drawings, the operation of my improved system is readily understood and its numerous advantages fully appreciated; but, briefly stated,it is as follows: The phonic wheel of the receiving apparatus is revolved continuously, energizing one at a time in succession the elect-romagnets 23. It will be seen that when an impulse is sent by the transmitting apparatus and received by the receiving apparatus the main circuit of the relay 17 is closed through the three coherers. Therefore each of the electromagnets 23 will have to perform its functions before the main circuit is broken or, in other words, the phonic wheel will'have to make one complete revolution; but if, impulses are received continuously at least one of the three coherers will alternately close the main circuit and operate the relay, the interval between the impulses not being long enough to allow the phonic wheel to make a complete revolution. I I

In this apparatus it will be noted that the circuits that operate the decohering-magnets are in no way affected by the coherers.

From the foregoing description it is evident that I provide a system of wireless telegraphy which is specially adapted for outdoor use and for long-distance work,as by operating the magnets in succession,.as described, the filings in the tubes are always properly decohered and at the proper time.

What I claim as new, and desire to secure by Letters Patent, is-

1. A receiving apparatus for wireless telegraphy, comprising air and ground plates, a series of wave-responsive devices in circuit therewith, metallic rings surrounding said wave-responsive devices, means for attracting said rings to cause them to restore the waveresponsive devices, and a phonic wheel for making successive circuits for energizing said before-mentioned means to cause the waveresponsive devices to be decohered one at a time in succession.

2. A receiver, comprising a series of waveresponsive devices in circuit with each other, means for restoring the wave-responsive devices, and a phonic wheel adapted to be continuously revolved to make successive circuits to energize one decohering means at a time.

3. A receiver, comprisinga series of waveresponsive devices, air and ground connections connected therewith, a main circuit embracing said wave-responsive devices, a relay in said main circuit, a sounder-circuit operated by said relay, and a phonic wheel for making successive circuits to cause the wave-responsive devices to be restored one at a time in succession.

4:. A receiver, comprising air and ground plates, a series of wave-responsive devices in circuit therewith, a restoring means for each wave-responsive device, separate circuits for each restoring means, and a phonic wheel for closing the circuits of said restoring means one at a time in succession.

5. A receiver, comprising a series of imperfect electrical contacts in circuit with each other, separate means for breaking each contact, a circuit for each of said means, and a phonic wheel vfor successively closing said circuits one at a time to successively break the contacts.

6. In an apparatus for communicating electrical signals, by means of a producer of Hertz oscillations, and a signaling instrument, the combination in a receiver, of a series of separate imperfect electrical contacts arranged in parallel, a circuit through the contacts, a receiving instrument operated by the influence of such oscillations on said contacts, separate means for breaking each contact, and a phonic wheelfor successively operating said contact-breaking means independent of the remainder of the receiver.

In testimony whereof I affix my signature in presence of two witnesses.

' HARRY SHOEMAKER.

Witnesses:

HENRY S. BASS, THOMAS H. RAWAND. 

